Street-cleaning roller.



No. 664,861. I Patented lan..I,-l90l. A. HENTSCHEL.

STREET CLEANING ROLLER.

(Application filed Mar. 12. 1900.)

(H0 Model.)

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Urren STATES PATENT OFFICE.

AUGUSTIN HENTSOHEL, OF BERLIN, GERMANY.

STREET-CLEANING RO LLER.

SPECIFICATION forming part of Letters Patent No. 664,861, dated January1, 1901.

Application filed March 12, 1900- Serial No. 8,35%. (N0 model.

To (all whont it may concern:

Be it known that I, AUGUSTIN HENTSOHEL, manufacturer, a subject of theKing of Prussia, Emperor of Germany, and a resident of Berlin, Germany,have invented certain new and useful Improvements in Street-CleaningRollers; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanyingdrawings, and to letters of referencemarked thereon, which form a part of this specification.

My invention consists of a new and useful roller for street-cleaningcarts or other similar devices and differs from the rollers heretoforeused for such purposes through its particular formation and means forholding the rubber blades or sweeps.

The rollers at present employed, consisting of massive wooden cylinderswith rubber blades fitted into screw-thread-like grooves cut in thesurface of the cylinder, have serious disadvantages. First, theserollers are very heavy, requiring large counterweights in order to beeasily raised and lowered, and, second, after short use they absorb somuch moisture from the sprinkled streets that they far overbalance theircounterweights, thus making them heavy to operate and addingconsiderable strain to the cart. In absorbing the water they warp ortwist so that, thirdly, the rubber blades become loosened, thus addingfurther to the difficulty met with originally in fastening these bladesin their grooves. The roller often becomes loose on the axle. In myinvention, however, these difficulties are avoided, as will behereinafter explained.

In the accompanying drawings, in which similar letters of referencerefer throughout to similar parts, Figure 1 illustrates a side view of aroller with spiral-set blades embodying my invention. Fig. 2 is a frontview of Fig. 1. Fig. 3 shows the roller with blades extendinglongitudinally.

In the construction of my invention I employ an axle a, upon which aresecurely mounted a plurality of disks 1), each of which has a toothedperiphery 0. Three of such disks may be employed, as illustrated, orif aroller is desired of shorter length the middle one may be omitted.

The roller-body itself consists of a plurality of strips d, made of woodor any other desirable material which can be easily made watertight andbe of light weight. These strips are arranged so as to snugly fit intothe toothed disks aforesaid, while rubber bladesf wedge tightly betweeneach of the said strips and extend outwardly a predetermined distancebeyond the latter.

The several parts of the roller can be as= sembled as shown in Fig. l,where the different strips, with their adjacent blades, present a spiralor screw-threaded-like roller, or they may be assembled in the ordershown in Fig. 3, where the disks are secured to the axle a, with theirteeth 0 o registering, and the strips, with the blades, carried betweenthe thus-registering teeth.

The strips cl and rubber blades f instead of being parallel with theroller shaft or spindle may be arranged spirally about the same. Thiscan be done in two ways. The toothed disks 1) may, for instance, besecured to the axle or shaft a, so that the spaces between their teethwill be in linethat is to say, on lines parallel with said shaft--andthe strips (1 and finserted into spaces between the teeth of the severaldisks out of line with one another, the pitch of the blades and stripsdepending, of course, upon the distance between the spaces in one enddisk, in which the ends of the two strips d and the intermediate rubberblade f are seated, from the corresponding spaces in the intermediateandopposite end disks 1), as will be readily understood, or this may beeffected by fastening all of the said strips and blades into position inthe form shown in Fig. 3, fastening one end disk tightly to the axle andthen giving a halfturn to the other end disks before fastening thelatter. In either case the strips wedged between the teeth 0 and theblades f wedged between the said strips are tightly held in position,the compactness of which is increased by giving them a spiral-liketwist.

The strips of wood (I are or may be waterproofed by any well-knownprocess in order to prevent absorption of moisture and consequentincrease in weight, as well as warping and the difficulties arisingtherefrom. It is 2. A new and useful roller for street-cleaning cartshaving an axle,toothed disks mounted thereon, strips extending from diskto disk and fastened between the teeth thereof, and rubber bladesadapted to be firmly held in position between and by said strips,substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

AUGUSTIN HENTSOHEL.

Witnesses:

WOLDEMAR HAUPT, MAS. C. STAEHLER.

